Victory Over Traffic Tickets

A physicist at the University of California San Diego used his knowledge
of measuring bodies in motion to show in court why he couldn't be
guilty of a ticket for failing to halt at a stop sign. The argument, now
a four-page paper delving into the differences between angular and
linear motion, supposedly got the physicist out of a $400 ticket. If you
want to use this excuse, you'll have to learn a little math -- and some
powers of persuasion.

The article cited a "paper", which is wrong, since it is only an ArXiv article (not sure if and where it was submitted). Note also that it was uploaded on April 1st, but supposedly, this isn't an April Fools stunt.

You may read his analysis yourself and see if you are convinced of his innocence, or if you can poke holes in his argument.